git

Git has several places where it keeps config values:

1. .../etc/config keeps system-level configuration values. This is normally handled by the super-user and not by a regular user.
2. ~/.gitconfig or ~/.config/git/config keeps current user configuration values.
3. .../.git/config keeps project-specific configuration values. This contains other useful details such as the origin of the configured repository.

See https://git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup.